VDT 461 GP almost road me off the road

Rand Airport is doing road works so the two lane now runs into one lane, I was in the left lane and in right of way when the white city golf came speeding past my car shot in front of me missing me by inches then had the cheek to throw me a zap sign when i hooted in fright at him then he slammed on breaks causing me to swerve from hitting him then he sped up and drove on. I am horrified that people like this almost killed me this morning and almost caused a huge car pile up.